turrning a 300 Rum into 30-378 wby whats needed

[jackelope]

Not sure why you'd want to turn a hot-rod .30 cal into another hot-rod .30 cal if you're looking for something different.

I'm with haugenna, a .338 Edge would be fun, and different than what you already have.

[257wbymagkiller]

Not sure why you'd want to turn a hot-rod .30 cal into another hot-rod .30 cal if you're looking for something different.

I'm with haugenna, a .338 Edge would be fun, and different than what you already have.

Yeah Idk hahaha I guess just want to build a semi custom bolt gun.

[whacker1]

Not sure why you'd want to turn a hot-rod .30 cal into another hot-rod .30 cal if you're looking for something different.

I'm with haugenna, a .338 Edge would be fun, and different than what you already have.

I shoot a 300 RUM and hunting partner has a 30-378.  We are working on loads now to make the factory Weatherbey loads less expensive, and I am just trying some different powders and bullets in my RUM.  If I were ever looking to hot rod my 300 RUM, the 338 edge would be the platform I would move to because the cost to do so is very affordable.  New barrel, reamer by gun smith, longer box mag, and dies and load development.  I am sure I missed something, and would actually provide the hot rod gains you are looking for.  Long heavy bullets flying at ridiculously fast speeds.  Very economical upgrade for what you are trying to do. 

[257wbymagkiller]

Not sure why you'd want to turn a hot-rod .30 cal into another hot-rod .30 cal if you're looking for something different.

I'm with haugenna, a .338 Edge would be fun, and different than what you already have.

I shoot a 300 RUM and hunting partner has a 30-378.  We are working on loads now to make the factory Weatherbey loads less expensive, and I am just trying some different powders and bullets in my RUM.  If I were ever looking to hot rod my 300 RUM, the 338 edge would be the platform I would move to because the cost to do so is very affordable.  New barrel, reamer by gun smith, longer box mag, and dies and load development.  I am sure I missed something, and would actually provide the hot rod gains you are looking for.  Long heavy bullets flying at ridiculously fast speeds.  Very economical upgrade for what you are trying to do. 

We'll 338 edge is looking very  tempting now. I'm going to have to look into it now and do some research now.

[Biggerhammer]

I would go with the .338 Edge and the Berger 300gr OTM's. The 300's shot well for me in the Edge along with the Hornady 285gr BTHP.

Easy to reload for, I just used RCBS .338 Ultra magnum dies and it still performed under half MOA with a 30" Benchmark barrel.





300 yard (Front). 1" target square in the photo.




(Back)

[257wbymagkiller]

I would go with the .338 Edge and the Berger 300gr OTM's. The 300's shot well for me in the Edge along with the Hornady 285gr BTHP.

Easy to reload for, I just used RCBS .338 Ultra magnum dies and it still performed under half MOA with a 30" Benchmark barrel.





300 yard (Front). 1" target square in the photo.




(Back)

I like that.

Biggerhammer are you able to get a barrel for that or aid in the process  of a build

[Biggerhammer]

On this one I had Benchmark barrels do all the work. Give Chris a call at Benchmark, their .338 barrels are outstanding.

They are in Arlington WA

http://benchmark-barrels.com/Benchmark_Barrels/Benchmark_Barrels_Home.html

[257wbymagkiller]

OK I'll give them a call and what length are you having the most luck with? 30" or a little shorter?

[BULLBLASTER]

338 edge! 

[b23]

So im thinking about taking  my Rem 700 PSS in 300 RUM and turnning it into a 30-378 wby, what all is needed to do so it will be my first bolt gun build.

I know barrel, and bolt but is that all thats needed?

Go easy on me here guys

Or maybe even a 7mm wby or 270 wby id consider turnning it into

You can address the larger case head in two different ways. 

1) You can have your current bolt face opened up to accommodate the larger case head of the big Weatherby but you'll also need to replace the extractor when you do.  I'd highly recommend using a pinned style extractor if you go this route.

2) Buy a whole new bolt from someone like PT&G with the appropriate size bolt face and already cut for a new pinned type extractor.

Unless you are just dead set on going the 30-378 route or you'll need factory ammo, I'd do a 30-338 Lapua Improved instead of the 30-378 Bee.

I've got a 300AX (Allen Express), aka 30-338 Lapua Improved, built on a Rem 700 by Kirby Allen.  With either, you want at least a 28in tube and I wouldn't go with anything smaller than a Sendero size barrel contour.  My 300AX has a Lilja #6 1-10tw 28in barrel and I shoot the Berger 230 Hybrid Tactical 3250 fps and have yet to through away a piece of brass with this load.

The 378 case is longer and has more case capacity than the improved 338 Lapua case but when both are loaded to a usable COAL the case capacities become much more even and Lapua brass speaks for itself with regard to quality and durability.

Regardless of which big 30 cal you choose, I'd have the extended mag box installed and if you do the 30-378 I'd make sure the reamer didn't have Weatherby freebore.

[257wbymagkiller]

So im thinking about taking  my Rem 700 PSS in 300 RUM and turnning it into a 30-378 wby, what all is needed to do so it will be my first bolt gun build.

I know barrel, and bolt but is that all thats needed?

Go easy on me here guys

Or maybe even a 7mm wby or 270 wby id consider turnning it into

You can address the larger case head in two different ways. 

1) You can have your current bolt face opened up to accommodate the larger case head of the big Weatherby but you'll also need to replace the extractor when you do.  I'd highly recommend using a pinned style extractor if you go this route.

2) Buy a whole new bolt from someone like PT&G with the appropriate size bolt face and already cut for a new pinned type extractor.

Unless you are just dead set on going the 30-378 route or you'll need factory ammo, I'd do a 30-338 Lapua Improved instead of the 30-378 Bee.

I've got a 300AX (Allen Express), aka 30-338 Lapua Improved, built on a Rem 700 by Kirby Allen.  With either, you want at least a 28in tube and I wouldn't go with anything smaller than a Sendero size barrel contour.  My 300AX has a Lilja #6 1-10tw 28in barrel and I shoot the Berger 230 Hybrid Tactical 3250 fps and have yet to through away a piece of brass with this load.

The 378 case is longer and has more case capacity than the improved 338 Lapua case but when both are loaded to a usable COAL the case capacities become much more even and Lapua brass speaks for itself with regard to quality and durability.

Regardless of which big 30 cal you choose, I'd have the extended mag box installed and if you do the 30-378 I'd make sure the reamer didn't have Weatherby freebore.

After thinking about it i think im going to go with the .338 Edge

So all ill need to get is a new barrel and some dies to get going 

Think im going with a 30" tube

[Biggerhammer]

OK I'll give them a call and what length are you having the most luck with? 30" or a little shorter?

If your going to be building a "Heavy" what's the difference between 26" and 30" weight wise? Not much? 30" just gives you max velocity within reason.

If it were a sporter weight, I would opt for 26".

[b23]

FWIW, if you want something that is a bit of a hot rod, do not buy the Accumark in 30-378 or 338-378.  The barrel on both is the weak link, it's not only to short but is also to light weight to see any real performance out of either of these two cartridges.  I had one, a 338-378, and whenever you try to throttle them up, the groups opened up and the more you try and stand on the gas the worse they get. 

It really sucks to have all that case capacity, like the 378 has, but you have to shoot it at speeds the same as a 338 RUM or you get groups that look like a shotgun pattern.

If you hang a Sendero size contour of at least 28 inches, not including brake, with a match grade chamber from one of the many top tier barrel companies, Benchmark would certainly be a good choice, and you have a whole different animal but in the factory barreled rifles like the Accumark, not so much.

[b23]

The 338 Edge is always a good choice and it'll save you some money by not having to mess with the bolt face issue but make sure you have an extended mag box put in it and if you don't, there's not much point doing an a 338 Edge over a 338 Rum and same deal with the barrel, I wouldn't go smaller than a Sendero contour and I wouldn't go shorter than 28in. not including the brake.

The big 30's are fun and have a lot to offer if they're built right and the recoil of the 30cal 230's is less than the .338 300's but have a good quality baffle brake installed and it's all good.

[Biggerhammer]

I agree after having shot the .338 Edge, there's isn't much of a difference between it and the .338 RUM. Heck the .338 RUM has more horse power than the .338 Lapua with the acception of the heaviest bullets (300gr).

A game animal or a target turret at distance won't be able to really tell the difference. Also since the .338 RUM is a slightly shorter case. It solves some of the COAL issues with the heavies in the .338 Edge when it comes to mag box length issues. My Edge has a wyattes extended mag box.